Biology; Chemistry; Physics: Post your doubts here!

[SalmanPakRocks]

Hey could anyone suggest which books are best for O level physics and chemistry? or if anyone could post useful, compiled and complete notes on them i would be grateful.

Physics : Explaining Physics, Physics Matters.
Chemistry: Chemistry Matters.

 

[scouserlfc]

Hey could anyone suggest which books are best for O level physics and chemistry? or if anyone could post useful, compiled and complete notes on them i would be grateful.

although the books suggested above are great and better but these books are detailed and for now just 3 or even lesss months left i would say to get the Federal publishers chemistry and Physics books as they have the explanation and the concepts in a concise way,others might disagree but i would give u this advise for now

 

[snowbrood]

i studied these federal books believe me they are the worst books in this universe
specially the physics one its of no use

 

[hassan100]

i studied these federal books believe me they are the worst books in this universe
specially the physics one its of no use

No way these are better than those long detailed books!!

 

[scouserlfc]

i studied these federal books believe me they are the worst books in this universe
specially the physics one its of no use

Um are u serious bro, if u have the pirated ones they look the worst yup but not the coloured version ones they have the info we need at this stage rather than the huge details in the other books ! Plus u look at the time that guy has who asked the ques if he is asking what books to use he never even started prep. so he needs a book which is not detailed and gets the concept easily !

 

[haha101]

hope this helps

Hey I am new and wanted to ask yew if you could send me the complete notes !

 

[mintchocolate4567]

Hey could anyone suggest which books are best for O level physics and chemistry? or if anyone could post useful, compiled and complete notes on them i would be grateful.

the green FEDERAL book by prescott is really good for chemistry....chemistry matter's good too.
and for physics,i'd suggest ''explaining physics'' by stephen pople

 

[Talha Iqbal]

Does anyone has paper + mark scheme of oct/nov 2011 chemistry paper? Please send it to me at [email protected]

 

[daredevil]

some please give me some good notes on germination, vegetative propogation and malaria for biology bcuz my teachre has not taught these topics good enough and my mocks are coming

 

[GetSomeLife]

WHAT volume of ammonia can be dissolved in 1 cm3 of water?? (PLEASE HELP)

 

[GetSomeLife]

and 1 more thing:

C2H5OH --> CH3COOH (in presense of oxygen etc etc) where did 2 of d H2 go???

 

[SalmanPakRocks]

and 1 more thing:

C2H5OH --> CH3COOH (in presense of oxygen etc etc) where did 2 of d H2 go???

Can u tell me the question?

 

[GetSomeLife]

not a q frm d pps...our sir was teaching this...i noticed their absence and asked but he refused to reply saying that it was out of the syllabus and thats all there is to this conversion...

 

[SalmanPakRocks]

not a q frm d pps...our sir was teaching this...i noticed their absence and asked but he refused to reply saying that it was out of the syllabus and thats all there is to this conversion...

U must be talking about ethanol converstion into Carboxlyic Acid.
It can be done by:
=> Reaction with Oxygen, or Oxidization agent

 

[GetSomeLife]

U must be talking about ethanol converstion into Carboxlyic Acid.
It can be done by:
=> Reaction with Oxygen, or Oxidization agent

yes yes i kno...bt 2 hydrogen get lost during the reaction...THATS my problem...and can u help me luk fer d ammonia one too?

 

[multixamza01]

and 1 more thing:

C2H5OH --> CH3COOH (in presense of oxygen etc etc) where did 2 of d H2 go???

I guess this is Oxidation of Ethanol to produce Ethanoic Acid. If so then this is the correct equation as specified in the 5070 2012 syllabus.

C2H5OH + Oxidizing Agent [ e.g pottasium dichromate (VI) ] ---> CH3COOH + H2O.

 

[SalmanPakRocks]

yes yes i kno...bt 2 hydrogen get lost during the reaction...THATS my problem...and can u help me luk fer d ammonia one too?

That is due to general formula:
Alcohols have general formula of CnH2n+1 OH
While Carboxoliyic has the formula CnH2n+COOH.
When we compare:
C2H5OH + O2 = CH3COOH + H2O

 

[GetSomeLife]

That is due to general formula:
Alcohols have general formula of CnH2n+1 OH
While Carboxoliyic has the formula CnH2n+COOH.
When we compare:
C2H5OH + O2 = CH3COOH + H2O

yes i got it frm MultiMaxima...however, sir din mention water AT ALL...
nyways, now only d oder 1 iz left

 

[Tharindu]

Does anyone have notes for physics alternative paper...if so please I need....

 

[SalmanPakRocks]

don't have the notes but have these